Jet apparatus.



S. L. KNEASS.

JET APPARATUS.

APPLICATION FILED AUG.4,1915.

1,1 59,957. Patented Nov. 9, 1915.

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COLUMBIA PMNQGRAPH (10.. WASHINGTON, D. c.

STRIGKLAND L. KNEASS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WILLIAM SELLERS & COMPANY, INCORPORATED, OF PHILADELPHIA, PENNSYLVANIA, A COR PORATION OF PENNSYLVANIA.

JET APPARATUS.

Application filed August 4, 1915.

To all whom it may concern:

Be it known that I, STRIOKLAND L. KNnAss, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Jet Apparatus, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to that division of jet apparatus which receives a supply of water under a head or pressure and is applicable to any form, independent of the relative areas of the steam nozzle and the delivery tube through which the combined jet discharges.

One object of the invention is to cause the steam when admitted to the apparatus to efiect, successively, the admission of water and steam, in such manner that no steam passes to the discharging nozzle until water has flooded the water chamber and the combining tube into which the steam jet discharges.

Another object is to control the timing of the admission of steam by the same piston or valve which mechanically controls the admission of water.

It is a further object to provide means by which outflow of water from the supply will be prevented except when the de vice is in operation.

It is a further object to render this device with its connecting pipe self-draining so that it may not freeze when exposed to a low temperature.

It is a further object to discharge a jet of water at a temperature below that at which injury might be caused to the operator.

To this end my invention consists in providing a water admission check valve open- .ing against the flow of water from the supply and a piston acted upon and forced to the end of its stroke when steam enters the body of the device, lifting the water check valve from its seat, admitting a supply of water to the water chamber and flooding the tubes, substantially as described in Patent No. 862,078, granted to me July 30th, 1907, all in combination with a delivery tube and steam nozzle to which steam cannot be admit-ted until water is admitted to the delivery; and it consists further in providing Patented Nov. 9, 1915.

Serial No. 43,574.

steam ports in the piston registering with corresponding steam admission ports to the steam nozzle; and it consists further in provlding in said piston and in the body of the device suitable ports through which condensed steam and water contained in it or in the connecting pipes shall drain through a terminal opening in the body or casin and it consists further in providing special means whereby water which would other wlse tend to pass into and remain in the steam pipe will be expelled therefrom as well as from the remainder of the apparatus.

In the drawings, which show a preferred embodiment of my invention, Figure 1 is a side elevation showing the location of the apparatus relative to the water supply tube, the steam supply pipe, and the delivery pipe. Fig. 2 is a sectional view of the apparatus. Fig. 3 is a detail view of the air check-valve on the steam supply pipe.

a represents a pipe through which water is conveyed under a head or pressure from a water supply to, for example, a feed pump or injector. This pipe communicates with the interior of a casing 12, which incloses water chambers c and cl, a piston chamber e and the steam ports leading to a steam passage 7. Threaded in a boss opening into the piston chamber 6 is a steam inlet pipe g. Threaded in the opening between the water chamber 0? and the steam passage is a steam nozzle 72.. Threaded in an opening in the water chamber (Z in front of the steam nozzle is a combining and delivery nozzle 2' communicating with a delivery pipe 11.

It will be understood that in the construction shown the steam nozzle and delivery nozzle operate as an ejector.

Water chamber a is in constant communication with the supply but is normally closed from water chamber [Z by means of a wateradmission check-valve 7a, which is normally held against its seat by the pressure of water in the supply. A spring 7', surrounding the upper valve stem 70 and confined between the valve proper and a cap Z threaded in the casing above the valve,'also tends to maintain the valve closed. Below the valve seat the lowervalve stem 70 projects through an opening between water chamber d and piston chamber a. The valve stem k is fluted and has a head 70 which normally projects below the opening between water chamber d and piston chamber 6 but which is adapted,

when the valve is raised to allow Water to flow into water chamber cl, to partially close of the piston. Piston m rests on a check valve 0 having a tapered lower end extending into a draining outlet 79 formed in the lower end of a cap 10 which is threaded into the lower end of the piston chamber. Valve 0 is normally held from'closing the outlet p by a spring r. The valve 0 has an openended axial passage 0, ports 0 establishing communication between passages oand the finterior of the cap communicating with the V the steam nozzle.

outlet, and ports 0 allowing steam to pass from pipe 9 into passage m of piston m. WVhen steam is admitted to the piston chamber, it depresses valve 0, closing outlet 79. Entering passage m, it forces ball valve n against its seat and lifts piston m, causing it to strike and lift valve is, allowing water from pipe a and water chamber 0 to fiood water chamber d and enter the delivery nozzle This occurs before piston m has lifted sufliciently to cause ports m to register with steam passage 7. As the fluted stem of valve it rises, the upper part of the piston chamber becomes partly closed, producing a dash pot and compelling the piston to rise slowly, giving ample time for the water to flood the water chamber and deliverynozzle before allowing steam to pass to reached its full stroke, it is held by the pres: sure of the steam firmly against the upper face of chamber 6, which acts as a valve seat, preventing leakage of steam between the piston and its cylinder walls from entering the water chamber d.

When the steam supply is shut off, the pressure of the inflowing water, and also spring j, seats valve is, thereby shutting off the passage of water to the ejector. Piston V m drops to its normal position and spring 1.

lifts valve 0, opening outlet p. Thewater and condensedsteam in water chamber at,

delivery nozzle 2' and steam passage 7, are

now free to drain off through the ports in piston m and valve 0, flowing out the outlet 79. r i

By completely draining the jet apparatus and the delivery pipe, all danger of freezing.

= is avoided. It was found, however, with the apparatus thus far described, that, at very low temperatures, the steam pipe would freeze. This curious phenomenon, the cause.

When the piston me has.

constantly open outlet end of the pipe or hose i, and thus force out the water and the steam pipe, and the obstruction tov the entrance of air through the channels discharging water, caused the water to be forced into the steam pipe where it was held by the partial vacuum behind it. To remedy this defect, I interpose in thesteam pipe a fitting 3 having a steam valve t and a check valve, beyond the steam valve, for admission of air. This checkvalve may comprise a cap a threaded into the fitting having air ports u and avalve head 1) having a stem 1) centered in the cap and normally held in open position by a spring 10. It may readily be understood that when the steam valve is opened steam pressure closes the air valve, and that when the steam valve-is closed spring to opens the air valve and allows'air to enter pipe 9 and expel the water therefrom. The device, when not in operation, therefore contains'no water except in chamber 0 over the water check valve. This chamber, being in direct communication with the pipe a, is warmed when steam is blown back in the usual manner. Freezing of any part of the apparatus even in the coldest weather, is therefore impossible. When water is drained from pipe a spring jmaintains valve is closed. When steam is blown back in pipe a, the steam pressure will also act to maintain valve is closed;

Hence steam cannot enter the deliverypipe,

condensed steam, the closing of the valve on I nozzle and delivery tube are such as to form 7 an ejector, it is obvious" the invention is equally applicable to the well recognized mechanical equivalent thereof known as an injector. While I have described the use of steam as the operating fluid, my invention includes the use of water, delivered by an injector, pump or other pressure producing device, conducted through the pipe 9, designated in the specification as the steam pipe, and its action in the'device will be similar to that of steam.

Having now fullyjdescribed my invention, what I claim and desireto protect by Letters Patent is;

1. In a jet apparatus,: a water supply, a

delivery nozzle, a steam nozzle, a steam sup ply, and means controlled by the steam from said supply to firstopen communication be tween the Water supply and the delivery nozzle and then admit steam to the steam nozzle.

2. In a jet apparatus, an ejector, a valve controlling the flow of water to the ejector,

a steam pipe, and means, actuatable by steam from said pipe, to first open said valve and then connect the steam pipe with the ejector.

3. In a jet apparatus, a water chamber containing an inlet port, a valve controlling said port and opening against the inflow of water, a steam nozzle, a delivery nozzle communicating with the water chamber, a steam supply, and means controlled by the steam from said supply to first open said valve to admit water to the delivery nozzle and then admit steam to the steam nozzle.

4. In a jet apparatus, a water chamber containing an inlet port, a valve controlling said port and opening against the inflow of water, a steam nozzle, a delivery nozzle, and a steam operated piston controlling the water admission valve and adapted to prevent passage of steam to the steam nozzle until the water admission valve is opened.

5. In a jet apparatus, a water chamber containin an inlet port, a valve controlling said port and opening against the inflow or water, a steam nozzle, a delivery nozzle, and a steam operated piston adapted to first open said valve and then admit steam to the steam nozzle.

6. In a jet apparatus, a water chamber containing an inlet port, a valve control l'ng said port and opening against the inflow of water, a steam nozzle, a delivery nozzle, and a steam operated piston controlling the water admission valve and having a steam port adapted to register with a port to the steam nozzle after th water admission valve is open,

7. in a jet apparatus, a water chamber containing an inlet port, a steam nozzle, a delivery nozzle, a piston chamber, means controlled by the piston, when steam-actuated, to open said port and retard the movement of the piston, said piston adapted to admit steam to the steam nozzle after said port is opened.

8. In a jet apparatus, a water chamber containing an inlet port, a steam nozzle, a delivery nozzle, a piston chamber opening to the water chamber. a valve controlling said port and open against the inflow of water, and having a stem adapted when the valve opens to partially close said opening, and a steam actuated piston in the piston chamber adapted to open said valve and also, after the valve stem closes said opening, to permit steam to pass to the steam nozzle.

9. In a jet apparatus, a water chamber containing an inlet port, a steam nozzle, a delivery nozzle, and means, including a ported steam piston and a valve controlled thereby opening against the inflow of Water to admit Water to the delivery nozzle, to permit Water to drain from the water chamber and delivery nozzle and to prevent inflow of steam to the water chamber.

10. In a jet apparatus, a water chamber containing an inlet port, a valve controlling said port and opening against the inflow of Water, a steam nozzle, a delivery nozzle, a steam pipe, and means to control the operation of the valve, to connect the steam pipe with the steam nozzle and to drain the water from the water chamber and delivery nozzle, a steam valve to admit steam to the steam pipe, and means to admit air to the steam pipe when the steam valve is closed.

11. In a jet apparatus, a water chamber containing an inlet port, a valve controlling said port and opening against the inflow of vater, a steam nozzle, a delivery nozzle, a steam pipe, and means to control the operation of the valve, to connect the steam pipe with the steam nozzle and to drain the water from the water chamber and delivery nozzle, a steam valve to admit steam to the steam pipe, and an automatic airinlet check-valve in the steam pipe adapted to be closed by the pressure of steam therein and to open when the steam valve is closed.

12. in a jet apparatus, a water chamber containing an inlet port, a steam nozzle, a delivery nozzle, a piston chamber opening to the water chamber, a piston in the piston chamber, and means controlled by the piston when steam-actuated toopen said inlet port and close said opening, said piston also adapted when steam-actuated to admit steam to the steam nozzle.

13. In a jet apparatus, water chamber containing an inlet port, a steam nozzle, a delivery nozzle, a piston chamber opening to the water chamber and to the steam nozzle, a steam actuated piston in the piston chamber, a steam pipe opening into the piston chamber, and means controlled by the piston to open the inlet port, close the opening between the piston chamber and water chamber and establish communication between the steam pipe and the steam nozzle- 1%. in a jet apparatus, a water chamber containing an inlet port, a steam nozzle, a deliver F nozzle, a piston chamber opening to the water chamber, a piston in the piston chamber, means controlled by the piston when steam-actuated to open said inlet port and close said opening, said piston also.

adapted when steam-actuated to admit steam to the steam nozzle and when steam is shut off to permit draining through the piston chamber.

15. In a jet apparatus, a water chamber containing an inlet port, a steam nozzle, a delivery nozzle, a piston chamber opening to the water chamber and to the steam nozzle, a steam actuated piston in the piston chamber, a steam pipe opening into the piston chamber, means controlled by the piston to open the inlet port and close the opening between the piston chamber and water chamber, said piston being ported whereby when steam-actuated it establishes communication between the steam pipe and the steam nozzle and whereby when in normal position it establishes communication from the water chamber and said nozzle to a draining outlet.

16. In a jet apparatus, a water chamber containing an inlet port, a steam nozzle, a delivery nozzle, a piston chamber opening to the water chamber and to the steam nozzle, a valve controlling said port and the opening between the water chamber and piston chamber, and a steam actuated piston in the piston chamber adapted to control the operation of said valve and the admission of steam to the steam nozzle, and afford a passage for the outflow of water from the water chamber and delivery nozzle.

17. In a jet apparatus, a water chamber containing an inlet port, a steam nozzle, a

delivery nozzle, a piston chamber opening to affording a passage for escape of water from the piston chamber.

'18. In a jet apparatus, a water chamber containing an inlet port, a steam nozzle, a delivery nozzle, a piston chamber opening to the water chamber and to the steam nozzle, asteam actuated piston in the piston chamber, a steam pipe opening into the piston chamber, means controlled by the piston to open the inlet port and close the opening between the piston chamber and, water chamber, said piston being ported whereby when steam-actuated it establishes communication between the steam pipe and the steam nozzle and whereby when in normal position it establishes communication from the water chamber and said nozzle, through the piston chamber, and a check valve having a pressure face opening into the piston chamber and adapted to close a draining outlet when steam actuated and to open the draining outlet when the steam is shut oil.

19. In jet apparatus, a water chamber containing an inlet port, a steam nozzle, a

delivery nozzle, a piston chamber opening 1 to the water chamber, a piston 1n the piston' and controlling a draining outlet.

20. In a jet apparatus, a water chamber having an inlet. port, a piston chamber opening thereinto, a steam nozzle, a delivery nozzle, a valve controlling said port and said opening, a piston controlling said valve and having a draining passage and steam ports opening into the passage, and a check valve in said passage arranged to close the passage when subjected to steam pressure, thereby permitting the piston to be actuated to open said valve and admit steam to the steam nozzle.

21. In a jet apparatus, a water supply having an inlet port, a piston chamber opening into the water chamber, a delivery nozzle communicating with the water chamber,

a steam nozzle communicating with the piston chamber, a valve controllingsaid port i and opening against the inflow of water, a valve stem extending into the piston chamber and adapted in the opening of the valve to throttle and close the opening between said chambers, a valve-operating piston in the piston chamber having an axially positioned water passage and steam ports, a check valve in said passage adapted to close same upon admission of steam to the piston chamber, a steam admission port in the piston chamber, and a ported check valve adapted upon admission of steam to the piston chamber to close a draining outlet.

In testimony of which invention, I have hereunto set my hand, at Philadelphia, on this ord' day of August, 1915.

STRIGKLAND KNEASS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

